will continue to recognize the visit as Google “organic” search, but will no longer report the query terms that the user searched on to reach your site. Keep in mind that the change will affect only a minority of your traffic. You will continue to see aggregate query data with no change, including visits from users who aren’t signed in and visits from Google “cpc”.

Apparently they did this to hit competitors who are using their search data for marketing networks (although they would never admit that!). They have said it's for the benefit of user privacy, but then they haven't stopped their paying Adwords customers from accessing the data. Basically if you want the data eventually you will have to pay. Right now they are saying that it's only for logged in Google users, so will only account for a small percentage of people. However, this is the bread and butter for most websites trying to get seen in search engines.